Question

why Fe.Co,Ni placed in 8th B ??​

Answer 1

Answer:

due to periodic classification of element

please mark as brainlist

Answer 2

Answer:

I'm currently reading in-depth about the layout of the Periodic Table, and I wondered why the table

As I understand, this is an old notation of the table, now deprecated.

The answer might be trivial, but it's interesting.